1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portlet.unitconverter.util;
24  
25  import com.liferay.portlet.unitconverter.model.Conversion;
26  
27  /**
28   * <a href="ConverterUtil.java.html"><b><i>View Source</i></b></a>
29   *
30   * @author James Lefeu
31   */
32  public class ConverterUtil {
33  
34      public static int TEMPERATURE_CELSIUS = 1;
35  
36      public static int TEMPERATURE_FAHRENHEIHT = 2;
37  
38      public static Conversion getConversion(int type, int fromId,
39                                             int toId, double fromValue) {
40          double toValue = 0;
41  
42          if (type == 0) {
43              toValue = convertLength(fromId, toId, fromValue);
44          }
45          else if (type == 1) {
46              toValue = convertArea(fromId, toId, fromValue);
47          }
48          else if (type == 2) {
49              toValue = convertVolume(fromId, toId, fromValue);
50          }
51          else if (type == 3) {
52              toValue = convertMass(fromId, toId, fromValue);
53          }
54          else if (type == 4) {
55              toValue = convertTemperature(fromId, toId, fromValue);
56          }
57  
58          return new Conversion(type, fromId, toId, fromValue, toValue);
59      }
60  
61      public static double convertArea(int fromId, int toId, double fromValue) {
62          return (fromValue / _AREA[fromId]) * _AREA[toId];
63      }
64  
65      public static double convertLength(int fromId, int toId, double fromValue) {
66          return (fromValue / _LENGTH[fromId]) * _LENGTH[toId];
67      }
68  
69      public static double convertMass(int fromId, int toId, double fromValue) {
70          return (fromValue / _MASS[fromId]) * _MASS[toId];
71      }
72  
73      public static double convertTemperature(int fromId, int toId,
74                                              double fromValue) {
75          return _fromTemperature(toId, _toTemperature(fromId, fromValue));
76      }
77  
78      public static double convertVolume(int fromId, int toId, double fromValue) {
79          return (fromValue / _VOLUME[fromId]) * _VOLUME[toId];
80      }
81  
82      private final static double _fromTemperature(int toId, double fromValue) {
83          if (toId == 0) {
84              return fromValue;                   // Kelvin
85          }
86          else if (toId == 1) {
87              return fromValue - 273.15;          // Celsius
88          }
89          else if (toId == 2) {
90              return (1.8 * fromValue) - 459.67;  // Fahrenheit
91          }
92          else if (toId == 3) {
93              return 1.8 * fromValue;             // Rankine
94          }
95          else if (toId == 4) {
96              return .8 * (fromValue - 273.15);   // R�aumure
97          }
98          else {
99              return 0;
100         }
101     }
102 
103     private final static double _toTemperature(int fromId, double fromValue) {
104         if (fromId == 0) {                      // Kelvin
105             return fromValue;
106         }
107         else if (fromId == 1) {                 // Celsius
108             return fromValue + 273.15;
109         }
110         else if (fromId == 2) {                 // Fahrenheit
111             return .5555555555 * (fromValue + 459.67);
112         }
113         else if (fromId == 3) {                 // Rankine
114             return .5555555555 * fromValue;
115         }
116         else if (fromId == 4) {
117             return (1.25 * fromValue) + 273.15; // R�aumure
118         }
119         else {
120             return 0;
121         }
122     }
123 
124     private final static double _AREA[] = new double[] {
125         1.0,                // Square Kilometer
126         1000000.0,          // Square Meter
127         10000000000.0,      // Square Centimeter
128         1000000000000.0,    // Square Millimeter
129         10763910,           // Square Foot
130         1550003000,         // Square Inch
131         1195990,            // Square Yard
132         0.3861022,          // Square Mile
133         100,                // Hectare
134         247.1054,           // Acre
135     };
136 
137     private final static double _LENGTH[] = new double[] {
138         1.0,                // Meter
139         1000.0,             // Millimeter
140         100.0,              // Centimeter
141         0.001,              // Kilometer
142         3.28084,            // Foot
143         39.37008,           // Inch
144         1.093613,           // Yard
145         0.000621,           // Mile
146         2.187227,           // Cubit
147         4.374453,           // Talent
148         13.12336            // Handbreath
149     };
150 
151     private final static double _MASS[] = new double[] {
152         1.0,                // Kilogram
153         2.204623,           // Pound
154         0.00110,            // Ton
155         0.02939497,         // Talent
156         1.763698,           // Mina
157         88.18491,           // Shekel
158         132.2774,           // Pim
159         176.2698,           // Beka
160         1763.698,           // Gerah
161     };
162 
163     private final static double _VOLUME[] = new double[] {
164         1.0,                // Liter
165         1000,               // Cubic Centimeter
166         61.02374,           // Cubic Inch (Liquid Measure)
167         1.816166,           // Pint (Dry Measure)
168         0.004729599,        // Cor (Homer)
169         0.009459198,        // Lethek
170         0.04729599,         // Ephah
171         0.141888,           // Seah
172         0.4729599,          // Omer
173         0.851328,           // Cab
174         0.04402868,         // Bath
175         0.2641721,          // Hin
176         3.170065,           // Log
177     };
178 
179 }